Classic trichoscopy of active lichen planopilaris, an immune mediated scarring alopecia is shown below.
There is redness and scale around hairs (called perifollicular erythema and perifollicular scale). Some hairs are twisted (called pili torti). The areas of scalp devoid of hairs are no longer red as the immune system has destroyed hairs in that area and has since left the area.
Article orginally posted at donovanmedical.com